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Provide one example in the accounting department that you can apply a contingency table to. Briefly explain how a contingency table can be useful.
Collapse the response categories in the following tables so that it meets the assumptions of the chi-square test; than perform the test.
Determine the probably of selecting a female or an accounting major? Which rule of addition did you apply?
For the first test, assume the data are from an independent-measures study using two separate samples.
In a recent year, 11th grade New York public school students taking an English test produced test scores that were normally distributed with a mean of 81 and a standard deviation of 6. Let x be a random variable that represents a test score.
Finding Normal probabilities using standard normal table or Excel built in functions
Estimate the 95% confidence interval for the proportion of the electorate that support this policy.
Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in the Education College.
a) Test whether there is a difference between attitudes in the 2 cities. Use a 95% alpha. b) What does your result say about attitude consistency across cities?
Calculate a 90% confidence interval for the percentage of homes in the US that had guns at the time of survey.
Die with 4 sides {1, 2, 3, 4} is tossed 2 times. Let X equal maximum of two observations and let Y equal minimum. Determine joint pmf of X and Y, and correlation coefficient. Are X and Y independent?
A random sample of 400 observations produced a sample proportion of 0.32. What is the standard error to construct a 99.5% confidence interval.
How would the General Counsel's decision in Part (b) change if the cost of selling the second suit were only $200,000? What if the cost were $900000?
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